drm/xe: Add SR-IOV info attribute to debugfs

As SR-IOV support varies between platforms and the driver can run
in different SR-IOV modes, add debugfs file with these details.

Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240404154431.583-4-michal.wajdeczko@intel.com

drivers/gpu/drm/xe/xe_debugfs.c

@@ -13,6 +13,7 @@
 #include "xe_device.h"
 #include "xe_gt_debugfs.h"
 #include "xe_pm.h"
+#include "xe_sriov.h"
 #include "xe_step.h"
 
 #ifdef CONFIG_DRM_XE_DEBUG
@@ -70,8 +71,18 @@ static int info(struct seq_file *m, void *data)
 	return 0;
 }
 
+static int sriov_info(struct seq_file *m, void *data)
+{
+	struct xe_device *xe = node_to_xe(m->private);
+	struct drm_printer p = drm_seq_file_printer(m);
+
+	xe_sriov_print_info(xe, &p);
+	return 0;
+}
+
 static const struct drm_info_list debugfs_list[] = {
 	{"info", info, 0},
+	{ .name = "sriov_info", .show = sriov_info, },
 };
 
 static int forcewake_open(struct inode *inode, struct file *file)

drivers/gpu/drm/xe/xe_sriov.c

@@ -101,3 +101,17 @@ int xe_sriov_init(struct xe_device *xe)
 
 	return drmm_add_action_or_reset(&xe->drm, fini_sriov, xe);
 }
+
+/**
+ * xe_sriov_print_info - Print basic SR-IOV information.
+ * @xe: the &xe_device to print info from
+ * @p: the &drm_printer
+ *
+ * Print SR-IOV related information into provided DRM printer.
+ */
+void xe_sriov_print_info(struct xe_device *xe, struct drm_printer *p)
+{
+	drm_printf(p, "supported: %s\n", str_yes_no(xe_device_has_sriov(xe)));
+	drm_printf(p, "enabled: %s\n", str_yes_no(IS_SRIOV(xe)));
+	drm_printf(p, "mode: %s\n", xe_sriov_mode_to_string(xe_device_sriov_mode(xe)));
+}

drivers/gpu/drm/xe/xe_sriov.h

@@ -10,9 +10,12 @@
 #include "xe_device_types.h"
 #include "xe_sriov_types.h"
 
+struct drm_printer;
+
 const char *xe_sriov_mode_to_string(enum xe_sriov_mode mode);
 
 void xe_sriov_probe_early(struct xe_device *xe);
+void xe_sriov_print_info(struct xe_device *xe, struct drm_printer *p);
 int xe_sriov_init(struct xe_device *xe);
 
 static inline enum xe_sriov_mode xe_device_sriov_mode(struct xe_device *xe)